A method for operating functional unit of a motor vehicle using an identification system, in which at least a first authorization is requested for operating the functional unit and an identification signal is transmitted to an identification device by an identification element of the identification system. The functional unit is operated after receiving and the functional unit is only operated in a second authorization. The second authorization is generated by the identification device. Using the identification device, a first signal duration of the identification signal is determined for determining a first spacing of the identification element at a first point in time, and a second signal duration of the identification signal is determined for determining a second spacing of the identification element at a second point in time, and the second authorization is generated depending on a comparison.
Legal claims defining the scope of protection, as filed with the USPTO.
2. The method of claim 1, wherein the second authorization is generated if the determined first spacing is exceeded by the determined second spacing.
3. The method of claim 1, wherein the second authorization is generated if the first spacing is greater than the second spacing.
4. The method of claim 1, wherein the first and second identification signals are received by a plurality of receiving devices of the identification device, and a respective signal duration measurement and a respective spacing determination from the respective plurality receiving devices is performed at the first point in time and at the second point in time.
5. The method of claim 4, wherein a position of the identification element relative to the motor vehicle is determined depending on the respectively determined spacings of the respective plurality of receiving devices.
6. The method of claim 1, wherein the first and second spacing are only taken into account in the comparison when the respective first and second spacing falls below a predetermined spacing threshold value.
8. The method of claim 1, wherein the mobile identification element is a vehicle key of the motor vehicle.
10. The identification system of claim 9, wherein identification system is configured so that the second authorization is generated if the determined first spacing is exceeded by the determined second spacing.
11. The identification system of claim 9, wherein identification system is configured so that second authorization is generated if the first spacing is greater than the second spacing.
12. The identification system of claim 9, wherein the first and second identification signals are received by a plurality of receiving devices of the identification device, and the identification system is configured to perform a respective signal duration measurement and a respective spacing determination from the respective plurality receiving devices at the first point in time and at the second point in time.
13. The identification system of claim 12, wherein the identification system is configured to determine a position of the identification element relative to the motor vehicle depending on the respectively determined spacings of the respective plurality of receiving devices.
14. The identification system of claim 9, wherein the identification system is configured so that the first and second spacing are only taken into account in the comparison when the respective first and second spacing falls below a predetermined spacing threshold value.
16. The identification system of claim 9, wherein the mobile identification element is a vehicle key of the motor vehicle.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
July 11, 2019
January 24, 2023
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